{
  "bibcode": "2017GCN.21651....1S",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), H. A. Krimm (NSF/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nA. Melandri (INAF-OAB), D. M. Palmer (LANL),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 170822A (trigger #768939)\n(Melandri et al., GCN Circ. 21640).  The BAT ground-calculated position is\nRA, Dec = 94.375, 55.000 deg which is\n  RA(J2000)  =  06h 17m 29.9s\n  Dec(J2000) = +54d 59' 59.0\"\nwith an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 12%.\n\nThe mask-weighted light curve shows a multi-peaked structure that starts at\n~ T-15 s and ends at ~T+60 s. T90 (15-350 keV) is 64 +- 16 sec (estimated\nerror including systematics).\n\nThe time-averaged spectrum from T-15.62 to T+64.38 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.80 +- 0.09.  The fluence in the 15-150 keV band is 6.4 +- 0.4 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+7.88 sec in the 15-150 keV band\nis 4.2 +- 0.7 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/768939/BA/",
  "circularId": 21651,
  "createdOn": 1503439945000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 170822A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 170822A"
}